The French Security Incident Response Team (FrSIRT) has alerted users to a high risk and exploitable problem titled VMware ESX Code Execution and Denial of Service Vulnerabilities. It affects VMware ESX Server version 3.5.
Multiple vulnerabilities have been identified in VMware ESX Server, which could be exploited by attackers to cause a denial of service, disclose sensitive information, bypass security restrictions or compromise an affected system. These issues are caused by errors in pcre, net-snmp, and OpenPegasus. For additional information, see : FrSIRT/ADV-2007-3725 - FrSIRT/ADV-2007-3802 - FrSIRT/ADV-2008-0063
The solution:
Apply patches (ESX350-200803214-UG and ESX350-200803214-UG) :
http://download3.vmware.com/software/esx/ESX350-200803214-UG.zip
http://download3.vmware.com/software/esx/ESX350-200803201-UG.zip